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Swift-XRT spectra of GRB 120816A

Last updated after receiving ObsID 00531223000, version 13

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 136 to 12460 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+139 s

N_H (Galactic)	5.18 × 10²¹ cm^-2
N_H (intrinsic)	7 (+33, -7) × 10²¹ cm^-2
z of absorber	0
Photon index	1.8 (+2.2, -1.3)
Flux (0.3-10 keV) (Observed)	2.5 (+2.8, -1.3) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.4 (+1.00 × 10¹⁰, -2.2) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	5.50 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.58 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	12.25 (11)
Spectrum exposure	7 s

PC mode. Mean photon arrival: T0+3405 s

N_H (Galactic)	5.18 × 10²¹ cm^-2
N_H (intrinsic)	4.6 (+2.7, -2.3) × 10²¹ cm^-2
z of absorber	0
Photon index	2.01 (+0.28, -0.26)
Flux (0.3-10 keV) (Observed)	6.8 (+0.9, -0.8) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.28 (+0.30, -0.19) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.86 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.10 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	240.64 (268)
Spectrum exposure	5.5 ks

Late Time spectrum (T0 + 4669 to 12460 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+8777 s

N_H (Galactic)	5.18 × 10²¹ cm^-2
N_H (intrinsic)	8 (+7, -5) × 10²¹ cm^-2
z of absorber	0
Photon index	2.2 (+0.6, -0.5)
Flux (0.3-10 keV) (Observed)	2.3 (+0.6, -0.5) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.6 (+5.6, -1.8) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.66 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.14 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	91.49 (106)
Spectrum exposure	4.1 ks